Hello,
I have upgraded my installation from 2.8 to 3.0 and now on hitting Add to cart button on any product description,
I get this error on message box.
Failed to add the product to the cart. Please refresh the page and try one more time.
After this when I try to load the website it only gives error message.
After clearing cache everything works again. The problem is repetitively reproducible.
Please help.
Rohit.